Perhaps you should try some spelling variations:
ngang chuan » zhang chuan
hanh trinh » canh tranh, hanh chinh
hieu manh » chieu xanh, hieu nganh, dieu hanh
cong cong » cong dong, trong cong, dang cong
dung cong » dung trong
hoc hieu » hoc thieu, hoc hien, doc hieu
chuan ha » chuan he, quan ha, chuan bi

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - hanh trinh luat ((cong cong) OR (dung cong)) ngang chuan ha~.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - hanh trinh luat ((cong cong) or (dung cong)) ngang chuan ha*.